@misc{indiciae1ef9653a3e21,
  title = {Differential tracking data types for accurate and efficient Mars planetary navigation},
  author = {Edwards, C. D., Jr. and Kahn, R. D. and Folkner, W. M. and Border, J. S.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920056932},
  note = {Source identifier: 19920056932}
}